/**
 * Copyright (c) Tiny Technologies, Inc. All rights reserved.
 * Licensed under the LGPL or a commercial license.
 * For LGPL see License.txt in the project root for license information.
 * For commercial licenses see https://www.tiny.cloud/
 *
 * Version: 5.6.2 (2020-12-08)
 */
(function () {
    'use strict';

    var global = tinymce.util.Tools.resolve('tinymce.PluginManager');

    var global$1 = tinymce.util.Tools.resolve('tinymce.dom.DOMUtils');

    var global$2 = tinymce.util.Tools.resolve('tinymce.EditorManager');

    var global$3 = tinymce.util.Tools.resolve('tinymce.Env');

    var global$4 = tinymce.util.Tools.resolve('tinymce.util.Delay');

    var global$5 = tinymce.util.Tools.resolve('tinymce.util.Tools');

    var global$6 = tinymce.util.Tools.resolve('tinymce.util.VK');

    var getTabFocusElements = function (editor) {
        return editor.getParam('tabfocus_elements', ':prev,:next');
    };
    var getTabFocus = function (editor) {
        return editor.getParam('tab_focus', getTabFocusElements(editor));
    };

    var DOM = global$1.DOM;
    var tabCancel = function (e) {
        if (e.keyCode === global$6.TAB && !e.ctrlKey && !e.altKey && !e.metaKey) {
            e.preventDefault();
        }
    };
    var setup = function (editor) {
        function tabHandler(e) {
            var x, i;
            if (e.keyCode !== global$6.TAB || e.ctrlKey || e.altKey || e.metaKey || e.isDefaultPrevented()) {
                return;
            }

            function find(direction) {
                var el = DOM.select(':input:enabled,*[tabindex]:not(iframe)');

                function canSelectRecursive(e) {
                    return e.nodeName === 'BODY' || e.type !== 'hidden' && e.style.display !== 'none' && e.style.visibility !== 'hidden' && canSelectRecursive(e.parentNode);
                }

                function canSelect(el) {
                    return /INPUT|TEXTAREA|BUTTON/.test(el.tagName) && global$2.get(e.id) && el.tabIndex !== -1 && canSelectRecursive(el);
                }

                global$5.each(el, function (e, i) {
                    if (e.id === editor.id) {
                        x = i;
                        return false;
                    }
                });
                if (direction > 0) {
                    for (i = x + 1; i < el.length; i++) {
                        if (canSelect(el[i])) {
                            return el[i];
                        }
                    }
                } else {
                    for (i = x - 1; i >= 0; i--) {
                        if (canSelect(el[i])) {
                            return el[i];
                        }
                    }
                }
                return null;
            }

            var v = global$5.explode(getTabFocus(editor));
            if (v.length === 1) {
                v[1] = v[0];
                v[0] = ':prev';
            }
            var el;
            if (e.shiftKey) {
                if (v[0] === ':prev') {
                    el = find(-1);
                } else {
                    el = DOM.get(v[0]);
                }
            } else {
                if (v[1] === ':next') {
                    el = find(1);
                } else {
                    el = DOM.get(v[1]);
                }
            }
            if (el) {
                var focusEditor = global$2.get(el.id || el.name);
                if (el.id && focusEditor) {
                    focusEditor.focus();
                } else {
                    global$4.setTimeout(function () {
                        if (!global$3.webkit) {
                            window.focus();
                        }
                        el.focus();
                    }, 10);
                }
                e.preventDefault();
            }
        }

        editor.on('init', function () {
            if (editor.inline) {
                DOM.setAttrib(editor.getBody(), 'tabIndex', null);
            }
            editor.on('keyup', tabCancel);
            if (global$3.gecko) {
                editor.on('keypress keydown', tabHandler);
            } else {
                editor.on('keydown', tabHandler);
            }
        });
    };

    function Plugin() {
        global.add('tabfocus', function (editor) {
            setup(editor);
        });
    }

    Plugin();

}());
